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INSTRUMENTED BALLISTIC TEST PROJECTILEFlyash, Boris, Platovskiy, Steve, Cantatore, Dominick 10 1900 (has links)
ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada / For years, ballisticians have been studying the phenomena associated with cannon launched projectiles. In particular, is the study of the pressure internal to the cannon and about the base of the projectile during cannon launch through muzzle exit. Pressure on the base is thought to be uniform and therefore hydrostatic, even though there are undulations in the magnitude of the pressure from the burning propellant. This paper studies various phenomena of the launching of 155-mm artillery projectiles with slip band obturators. Specifically, pressure gradients in and around the base and pressure along the body caused by obturator “blow-by” during the interior ballistic flight and muzzle exit. This study is accomplished by use of two different types of Instrumented Ballistic Test Projectiles (IBTP). The objective of tests performed was to successfully capture pressure and acceleration live data which will be used to characterize the localized base and body pressurization on a 155-mm artillery cannon launched projectile. The telemetry system used for these tests was the ARRT-124 telemetry system provided by the Armament Research, Development, and Engineering Center, specifically the Precision Munitions Instrumentation Division. The telemetry system used for the IBTP employs a traditional FM/FM technique for monitoring and transmitting a number of analog channels. Preliminary captured data indicated localized fluctuations in pressure that are not uniform over the base and the projectile body. Further studying of the data may provide insight into other projectile dynamics such as fin deployment, set forward accelerations at muzzle exit, and obturator performance.
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The nature of gustiness of typhoon winds and gust loading onbuildings何家聰, Ho, Kar-chung, John. January 1976 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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Investigation of the dynamic response of a multi-storey building underwind loadingLam, Chi-hung, Louis., 林志雄. January 1972 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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Viscous-damping walls for controlling wind-induced vibrations in buildings揚毅, Yeung, Ngai. January 2000 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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The application of the theory of extremes to the estimation of design wind speeds倫志樑, Lun, Chi Leung, Kenneth. January 1970 (has links)
published_or_final_version / Civil Engineering / Master / Master of Science in Engineering
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The American Chamber of Commerce (Hong Kong): an analysis of a dual purpose business and political organizationHimango, Stephanie V. January 1996 (has links)
published_or_final_version / Politics and Public Administration / Master / Master of Philosophy
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Characteristics of atmospheric turbulence as applied to wind loading on structuresChoi, Cheong-chuen, Edmund., 蔡昌全. January 1970 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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Undertrycksbehandling av sår – påverkan på patientens livskvalitet och hälsa : En litteraturstudie / Negative Pressure Wound Therapy – effects on the patient’s quality of life and health. : A literature studyPreisz, Emilia, Berg, Nathalie January 2015 (has links)
Introduktion: Olika typer av sår skapar stort lidande för den drabbade och Negative Pressure Wound Therapy (NPWT) är en behandlingsmetod som utvecklats för att effektivisera sårläkningsprocessen. Livskvaliteten och hälsan påverkas av såret och dess utveckling, vilket gör omvårdnaden vid sårbehandling grundläggande för patientens välmående. Syfte: Syftet var att belysa hur Negative Pressure Wound Therapy påverkar patientens livskvalitet och hälsa. Metod: Polit och Beck (2012) niostegsmodell användes för litteraturstudien. Artikelsökningarna gjordes i två olika databaser samt manuella sökningar och resultatet grundades på tolv artiklar som genomgick en kvalitetsgranskning. Resultat: Fem teman identifierades påverka patientens upplevelse av behandlingen. Behandlingen påverkar den fysiska förmågan att leva ett dagligt liv och tenderar att framkalla smärta vid omläggning. Behandlingen tenderar även att på ett psykiskt påfrestande sätt påverka både det allmänna välmåendet och det sociala livet. Kunskap och information, hos både personal och patient, visades ha en inverkan på patientens livskvalitet och hälsa. Slutsats: Denna avancerade sårbehandling påverkar patientens livskvalitet och hälsa. Behandlingen innebär en fysisk påfrestning där patienten behöver bära runt på en behandlingsmaskin samt uppleva smärta. Det innebär också en psykisk påfrestning som ger utryck i stress, oro och rädsla samt en risk för isolering i det sociala livet. Det är därför av största vikt att vårdpersonal införskaffar sig och tillgodoser patientens behov av information och kunskap för att förutsättningar för en optimal omvårdnad ska kunna skapas.
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Association of arterial stiffness and blood pressure variability with silent brain lesions in healthy hypertensive elderly ChineseXie, Bingjiao, 謝冰姣 January 2015 (has links)
abstract / Medicine / Doctoral / Doctor of Philosophy
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A statistical analysis of sea level and wind stress at seven locations on the West Coast of North AmericaOsmer, Stephen Robert 26 July 1977 (has links)
Sea level and the alongshore component of wind stress data at
seven locations on the Pacific coast of Canada and the United States
were analyzed. The effective data period was from August 1, 1973 to
September 9, 1975. The seven locations were Tofino, British
Columbia; Neah Bay and Toke Point, Washington; South beach (Newport)
and Charleston, Oregon; and Crescent City and San Francisco,
California.
Sea level relative to the two year mean is higher at the northern
locations during the winter months than it is at the southern
stations. There appears to be an annual cycle in the sea level
though the amplitudes are different for the two years. The monthly
mean wind stress is northward during the winter months, and has a
larger value at the northern locations. During the spring and summer
the monthly mean wind stress is southward and has a larger value at
the southern stations.
Linear correlation analysis was performed on the sea level data
and on the alongshore component of wind stress for the entire time
period and seasonally. Auto-correlations and cross correlations were
computed for the adjusted sea levels and wind stress. This analysis
shows that the sea level and wind stress fluctuations among these
seven locations are coherent. These show that the correlation is
a function of location and that it has a seasonal variation. It also
appears that by examining plots of correlation coefficients and of
sea level slopes, that the region may be divided into two major
regimes. This separation might be interpreted as the locale where
the West Wind Drift impinges on the coast. / Graduation date: 1978
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